12 Angry Men (1957). A dissenting juror in a murder trial slowly manages to convince the others that the case is not as obviously clear as it seemed in court. Imdb: details

Darmok (Star Trek: The Next Generation, 28 September 1991). Picard must learn to communicate with a race that speaks in metaphor under a difficult set of circumstances. Imdb: details

Gandhi (1982). The life of the lawyer who became the famed leader of the Indian revolts against the British rule through his philosophy of nonviolent protest. Imdb: details

Nixon (PBS: The American Experience, 1990). Documentary that analyzes Nixon’s rise and fall as a leader.
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Reagan (PBS: The American Experience, 1998). Documentary that analyzes Reagan’s evolution as a leader. Imdb: details

Twelve O’Clock High (1949). A hard-as-nails general takes over a bomber unit suffering from low morale and whips them into fighting shape. Imdb: details